Cita APA (7th ed.)

O'Sullivan, A., & Sheffrin, S. M. (2006). Economics: Principles and tools (4th ed.). Pearson/ Prentice Hall.

Cita Chicago (17th ed.)

O'Sullivan, Arthur, i Steven M. Sheffrin. Economics: Principles and Tools. 4th ed. Upper Saddle River, NJ: Pearson/ Prentice Hall, 2006.

Cita MLA (8th ed.)

O'Sullivan, Arthur, i Steven M. Sheffrin. Economics: Principles and Tools. 4th ed. Pearson/ Prentice Hall, 2006.